I don't know about ghastly, there's been plenty of cereals over the years that turns your milk different colors (not counting all those cocoa cereals that turn your milk brown).
Yes, I know different cereals can turn the milk different colors, but Fruit Brute was LOUD orange, like visible-from-space orange.
On one little tangent, while Kellogg's also promoted Pop Tarts, in the late 60's/early 70's they also marketed another toaster pastry called Danish Go-Rounds. I remember them (the cherry was fantastic!), but unfortunately they fell by the wayside. This was really too bad, because I think they were far better than Pop Tarts. Trouble was, because of their size and shape, they tended to get stuck in the toaster quite a bit. I'm sorry most of you never got a chance to try one (the last time I had one, I was about five!), I feel like you missed out, and I just miss them. (sniff!) Maybe maybe MAYBE someday, somebody in Battle Creek, Michigan, will get nostalgic enough and bring them back. They're way overdue.